Traveling bag

ABSTRACT

Provided is a traveling bag that can be folded to a small volume so as to be stored in a small space for reducing transportation and storage costs. The traveling bag has front and rear sides, and four peripheral sides connecting the front and rear sides. The traveling bag includes: first and second zippers each configured to connect three edges of each of two mutually facing peripheral sides of the four peripheral sides to one of the front and rear sides and edges of the other two peripheral sides, wherein when the first and second zippers are opened, the two mutually facing peripheral sides are foldable along the other edge thereof. Therefore, the traveling bag can be folded to a small volume so as to be stored in a small space. Furthermore, the traveling bag can be kept in a predetermined shape for storing and carrying items more safely.

TECHNICAL FIELD

The present invention relates to a traveling bag, and more particularly, to a traveling bag that can be folded to a small volume so as to be stored in a small space for reducing transportation and storage costs.

BACKGROUND ART

Generally, bags means various containers used for conveniently storing and carrying items.

According to the purposes, bags can be classified into handbags, shoulder bags, Boston bags, suitcases, briefcases, trunks, rucksacks, attache cases, gazette bags, and cosmetic bags. According to the raw materials, bags can be classified into cloth, leather, synthetic leather, and synthetic plastic bags.

Multipurpose bags have been introduced to satisfy demands of people who frequently use bags for different purposes. In addition, since the appearances or designs of bags have become important factors in the competitive market, various bags that cannot be classified based on the above-mentioned criteria have been introduced.

An example of such bags is shown in FIG. 1. FIG. 1 is a perspective view illustrating a trunk, also called a traveling bag or cart bag. The trunk is a bag usually used by travelers. The trunk includes frames 30 and 32 for maintaining the shape of the trunk even when the trunk impacted, and an outer cover 10 enclosing the frames 30 and 32. Recently, the use of bags like the trunk of FIG. 1 is explosively increased since people travel more frequently, and thus the design of such bags has been modernized and diversified. Hereinafter, such bags will be referred to as a traveling bag.

As shown in FIG. 1, the frames 30 and 32 of the traveling bag are usually formed of a metal such as aluminum or a synthetic resin such as poly-ethylene (PE). The outer cover 10 may be formed of cloth, leather, or synthetic leather. The outer cover 10 encloses the frames 30 and 32 for forming the hexahedral shape of the traveling bag. A door 13 is formed on one side of the traveling bag, and the door 13 can be closed using a zipper 42.

The traveling bag has a front side 12 at which the door 13 and the zipper 42 are formed, a rear side 14 facing the front side 12, and four peripheral sides 16, 18, 20, and 22. When the traveling bag is erected, the peripheral sides 16 and 20 become top and bottom sides, and the peripheral sides 18 and 22 become right and left sides.

The frames 30 and 32 are fundamental structures forming the shape of the traveling bag. The frame 30 is a rear frame shaped like a plate or bar for supporting the rear side 14 of the traveling bag. The frame 32 is a peripheral frame shaped like a plate or bar disposed along the periphery of the rear frame 30 for supporting the four peripheral sides 16, 18, 20, and 22 of the traveling bag. The outer cover 10 covers the rear frame 30 and the peripheral frame 32 for forming the exterior of the traveling bag. The door 13 is formed at the front side 12 of the traveling bag, and the zipper 42 is disposed around the door 13 for opening and closing the door 13. A handle 44 is attached to the top side 16, and a cart handle 46 is attached to the rear side 14. The cart handle 46 is vertically extendable from top side 16. At least two wheels 48 are mounted on the bottom side 20. An inner cover (not shown) can be additionally attached along the inside of the traveling bag for preventing interferences between items and the peripheral frame 32 when the items are put into the traveling bag or taken out of the traveling bag.

After opening the door 13 of the front side 12 using the zipper 42, a user can place items into the traveling bag. Then, the user can close the door 13 using the zipper 42. The user can carry the traveling bag by holding the traveling bag using the handle 44 or wheel the traveling bag by pulling the traveling bag using the cart handle 46. Since the shape of the traveling bag can be maintained owing to the rigid frames 30 and 32, items contained in the traveling bag can be safely carried even when the inside area of the traveling bag is not fully filled with items.

However, since the traveling bag occupies the same space regardless of whether the traveling bag is empty or fully filled, unnecessary costs can be spent for transporting the traveling bag and keeping the traveling bag in storage.

That is, due to the unchangeable shape of the traveling bag, an additional space is necessary for storing or carrying items using the traveling bag. For example, when such traveling bags are stored in a confined space such as a storage room, a car, or a container for ship or air transportation, the number of traveling bags that can be stored in the confined space is low. In addition, if the traveling bags are too densely stored in such a confined space, frames of the traveling bags can be damaged or broken.

In a method for addressing these problems, items are first put into relatively small bags, and then the small bags are placed into a traveling bag. However, in this case, items having various sizes cannot be effectively stored in the traveling bag.

For these reasons, unnecessary costs are spent for storing and transporting items using such traveling bags. For example, prices of products transported using such traveling bags may be increased. Therefore, there is a need for a traveling bag that can reduce transportation and storage costs.

DISCLOSURE OF INVENTION Technical Problem

Accordingly, the present invention is directed to a traveling bag that substantially obviates one or more of the problems due to limitations and disadvantages of the related art. The traveling bag can be folded to a small volume so as to be stored in a small space for reducing transportation and storage costs. Furthermore, the traveling bag can be kept in a predetermined shape for storing and carrying items more safely.

Technical Solution

According to an aspect of the present invention, there is provided a traveling bag having front and rear sides, and four peripheral sides connecting the front and rear sides, the traveling bag including: first and second zippers each configured to connect three edges of each of two mutually facing peripheral sides of the four peripheral sides to one of the front and rear sides and edges of the other two peripheral sides, wherein when the first and second zippers are opened, the two mutually facing peripheral sides are foldable along the other edge thereof.

The traveling bag may further include peripheral frames disposed at at least the two mutually facing peripheral sides of the four peripheral sides so as to maintain a shape of the traveling bag. The traveling bag may further include a wire disposed along at least a side of the first and second zippers so as to maintain a shape of the traveling bag. The traveling bag may further include: a main zipper disposed at the front side to form a door; and a handle disposed on an outer surface of at least one of the four peripheral sides. The traveling bag may further include: a cart handle extendable from at least one of the four peripheral sides; and a wheel disposed at at least one of the four peripheral sides.

According to another aspect of the present invention, there is provided a traveling bag having front and rear sides, and four peripheral sides connecting the front and rear sides, the traveling bag including: four peripheral frames disposed at inner surfaces of the four peripheral sides, respectively, so that both edges of the peripheral frame is close to edges of two neighboring peripheral frames; and four connecting members each configured to connect closely disposed edges of two neighboring peripheral frames of the four peripheral frames.

The traveling bag may further include first and second holding members disposed at both edges of the four peripheral frames in a direction from the front side to the rear side, wherein each of the four the connecting members detachably connects the first and second holding members disposed at the closed disposed edges of the two neighboring peripheral frames. Each of the four connecting members may include: first and second pin portions configured to be coupled to the first and second holding members disposed at the closed disposed edges of the two neighboring peripheral frames; and a bridge connecting the first and second pin portions. One of the pin portion and the holding member may include a hole formed in the direction from the front side to the rear side, and the other of the pin portion and the holding member may include a protrusion formed in the same direction as the hole. The traveling bag may further include first to fourth subsidiary zippers disposed between the four peripheral sides. The traveling bag may further include: a main zipper disposed at the front side to form a door; and a handle disposed on an outer surface of at least one of the four peripheral sides. The traveling bag may further include: a cart handle extendable from at least one of the four peripheral sides; and a wheel disposed at at least one of the four peripheral sides.

Advantageous Effects

According to the present invention, the traveling bag can be folded to a small volume so as to be stored in a small space. Furthermore, the traveling bag can be kept in a predetermined shape for storing and carrying items more safely.

Therefore, transportation and storage costs can be reduced, and items can be safely kept and carried.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view illustrating a conventional traveling bag.

FIG. 2 is a perspective view illustrating a traveling bag according to a first embodiment of the present invention.

FIG. 3 is a perspective view illustrating an opened state of the traveling bag according to the first embodiment of the present invention.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3.

FIGS. 5 through 7 are perspective views for explaining a method of folding the traveling bag according to the first embodiment of the present invention.

FIG. 8 is a perspective view illustrating a modified version of the traveling bag according to the first embodiment of the present invention.

FIG. 9 is a perspective view illustrating a traveling bag according to a second embodiment of the present invention.

FIG. 10 is a perspective view illustrating an opened state of the traveling bag according to the second embodiment of the present invention.

FIG. 11 is an enlarged view of the encircled portion of FIG. 10.

FIG. 12 is a sectional view taken along line XII-XII of FIG. 10.

FIGS. 13 through 15 are perspective views for explaining a method of folding the traveling bag according to the second embodiment of the present invention.

FIG. 16 is a perspective view illustrating a modified version of the traveling bag according to the second embodiment of the present invention.

MODE FOR THE INVENTION

The present invention will now be described more fully with reference to the accompanying drawings.

In the following description, exemplary embodiments are introduced for provide easy and complete understanding of the scope and spirit of the present invention. Elements explained in a description of a first embodiment will not be explained in descriptions of the other embodiments for conciseness. In the descriptions of the other embodiments, different elements or characteristics will be mainly explained.

First Embodiment

FIG. 2 is a perspective view illustrating a traveling bag according to a first embodiment of the present invention.

Referring to FIG. 2, the traveling bag of the first embodiment includes a front side 110, a rear side 112, and four peripheral sides 114, 116, 118, and 120. In the traveling bag, an accommodation space is formed to receive items.

A door is formed at the front side 110, and a main zipper 150 is disposed along the door for closing and opening the door. When the traveling bag is erected, the peripheral side 114 becomes a top side, and a handle 152 is attached to the top side. A cart handle 154 is attached to the rear side 112. The cart handle 154 can be vertically extended from the top side. At least one caster type wheel 156 can be attached to the lowest side of the four peripheral sides 114, 116, 118, and 120 using a rotation shaft 158.

After opening the door using the main zipper 150, a user can put items into the traveling bag. Then, the user can close the door using the main zipper 150. The user can carry the traveling bag by holding the handle 152 or wheel the traveling bag after placing the wheel 156 of the traveling bag on a floor and adjusting the length of the cart handle 154.

The traveling bag of the first embodiment further includes frames 130, 132, 134, 136, and 138 for as structural components, and an outer cover 102 covering the frames 130, 132, 134, 136, and 138 for forming the exterior of the traveling bag. The frames 130, 132, 134, 136, and 138 includes a rear frame 130 supporting the rear side 112, and first to fourth peripheral frames 132, 134, 136, and 138 supporting the four peripheral sides 114, 116, 118, and 120.

The rear frame 130 may include a plate or at least one bar formed of a metal or a synthetic resin such as poly-ethylene (PE). The first to fourth peripheral frames 132, 134, 136, and 138 are arranged along the periphery of the rear frame 130 in perpendicular to the rear frame 130. Each of the first to fourth peripheral frames 132, 134, 136, and 138 may include a plate or at least one bar formed of the same material as that used for forming the rear frame 130. Hereinafter, the four peripheral sides 114, 116, 118, and 120 will be referred to as first to fourth peripheral sides 114, 116, 118, and 120 in correspondence with the first to fourth peripheral frames 132, 134, 136, and 138.

Mutually facing two frames of the first to fourth peripheral frames 132, 134, 136, and 138 can be paired. The mutually facing frames may have the same shape. In this case, both edges of one of the first to fourth peripheral frames 132, 134, 136, and 138 may be disposed close to edges of two peripheral frames 134-138,132-136,134-138, or 132-136. For example, as shown in FIG. 2, both edges of the first peripheral frame 132 are disposed close to edges of the second and fourth peripheral frames 134 and 138. Both edges of the second peripheral frame 134 are disposed close to edges of the first and third peripheral frames 132 and 136. Both edges of the third peripheral frame 136 are disposed close to other edges of the second and fourth peripheral frames 134 and 138. Both edges of the fourth peripheral frame 138 are disposed close to other edges of the first and third peripheral frames 132 and 136.

Particularly, in the traveling bag of the first embodiment, six edges of mutually facing two peripheral sides 114-118 or 116-120 are connected to one of the front and rear sides 110 and 120 and the other mutually facing two peripheral sides 116-120 or 114-118 through first and second zippers 162 and 164 (refer to FIG. 2). For example, six edges of the second and fourth peripheral sides 116 and 120 can be connected to one of the front and rear sides 110 and 120 and the other mutually facing two peripheral sides 114 and 118 through the first and second zippers 162 and 164.

Therefore, when the traveling bag of the first embodiment is used for storing items, the traveling bag can have a predetermined shape by closing the first and second zippers 162 and 164. When the traveling bag is stored or loaded to a predetermined storage room, the traveling bag can be folded to the minimum size after opening the zippers 162 and 164.

This will be described in more detail with reference to FIG. 3 illustrating a perspective view of the traveling bag of the first embodiment.

Referring to FIG. 3, three edges of each of the second and fourth peripheral sides 116 and 120 are connected to one of the front and rear sides 110 and 120 and the first and third peripheral sides 114 and 118 through the zippers 162 and 164. Therefore, when the zippers 162 and 164 are opened, the second and fourth peripheral sides 116 and 120 can be rotated on the other edges connected to the rear side 112.

Thus, after opening the zippers 162 and 164, the second and fourth peripheral sides 116 and 120 can be folded onto the rear side 112. Then, the traveling bag cannot maintain its shape against a force acting from the front or back of the traveling bag. That is, the first and third peripheral sides 114 and 118 can also be folded onto the rear side 112. In this way, the traveling bag can be folded into a flat shape.

The handle 152 can be disposed on the first peripheral side 114 by fixing the handle 152 to the first peripheral frame 132 using first fixing members R1 such as rivets passing through the outer cover 102. The wheel 156 can be mounted on the third peripheral side 118 by fixing the wheel 156 to the third peripheral frame 136 using second fixing members R2 (refer to FIG. 7) such as rivets or bolts and nuts passing through the outer cover 102. In the same way, the second and fourth peripheral frames 134 and 138 can be coupled to the second and fourth peripheral sides 116 and 120 using fixing members such as rivets or bolts and nuts. Therefore, the first to fourth peripheral frames 132, 134, 136, and 138 can be folded together with the first to fourth peripheral sides 114, 116, 118, and 120.

Alternatively, an additional inner cover can be used to fold the second and fourth peripheral frames 134 and 138 together with the second and fourth peripheral sides 116 and 120. This structure will be described with reference to FIG. 4. FIG. 4 is a sectional view taken along line IV-IV of FIG. 3.

Referring to FIG. 4, the traveling bag of the first embodiment may further include a first inner cover 166. The first inner cover 166 may cover the second peripheral frame 134 and be fixed to the second peripheral side 116 by, for example, stitching. In this way, the second peripheral frame 134 can be folded together with the second peripheral side 116. The fourth peripheral frame 138 can be attached to the fourth peripheral side 120 in the same way so as to fold the fourth peripheral frame 138 together with the fourth peripheral side 120. The traveling bag may further include an additional inner cover for covering inner surfaces of the rear frame 130 and the first to fourth peripheral frames 132, 134, 136, and 138. In this case, items can be easily put into the traveling bag and taken out of the traveling bag without interferences.

Therefore, when the zippers 162 and 164 are closed, the first to fourth peripheral frames 132, 134, 136, and 138 can be connected into a rectangular shape having a predetermined volume. After opening the zippers 162 and 164, the second and fourth peripheral sides 116 and 120, and the first and third peripheral sides 114 and 118 can be folded on to the rear side 112 to reduce the volume of the traveling bag.

FIGS. 5 through 7 are perspective views for explaining a method of folding the traveling bag according to the first embodiment of the present invention.

First, the traveling bag of the first embodiment is laid down as shown in FIG. 5 to easily fold the traveling bag. In this state, the rear side 112 of the traveling bag faces the floor, and the front side 110 of the traveling bag faces upward.

Next, as shown in FIG. 6, after opening the zippers 162 and 164, the second and fourth peripheral sides 116 and 120 are folded onto the rear side 112.

Next, as shown in FIG. 7, the first and third peripheral sides 114 and 118 are folded onto the rear side 112. In this way, the traveling bag of the first embodiment can be folded into a flat shape having a small volume.

The folded traveling bag can be unfolded in a reverse order. That is, after erecting the first and third peripheral sides 114 and 118 and the second and fourth peripheral sides 116 and 120 at an upright angle to the rear side 112, the zippers 162 and 164 are closed to connect the first to fourth peripheral frames 132, 134, 136, and 138 into a rectangular shape (refer to FIG. 2). Therefore, according to the present invention, whether the traveling bag is filled with items or not, the traveling bag can maintain its volume. After putting items into the traveling bag, the main zipper 150 can be closed to safely keeping and carrying the items.

FIG. 8 is a perspective view illustrating a modified version of the traveling bag according to the first embodiment of the present invention. Elements of the modified version having the same functions and structures as the above-described elements will be denoted and referred to in the same way, and thus detailed descriptions thereof will be omitted.

Referring to FIG. 8, in the modified version of the first embodiment, longitudinal grooves having a predetermined depth are formed in center portions of the second and fourth peripheral frames 134 and 138 as first and second folding lines L1 and L2. Therefore, after opening the zippers 162 and 164, the second and fourth peripheral sides 116 and 120 and the second and fourth peripheral frames 134 and 138 can be folded along the first and second folding lines L1 and L2. Then, the first and third peripheral sides 114 and 118 and the first and third peripheral frames 132 and 136 can be folded so as to reduce the volume of the traveling bag by more than about 0.5 times the unfolded volume of the traveling bag.

In the first embodiment, the first to fourth peripheral frames 132, 134, 136, and 138 are not essential elements of the traveling bag. The first to fourth peripheral frames 132, 134, 136, and 138 are exemplary elements for maintaining the shape of the traveling bag. That is, instead of using the first to fourth peripheral frames 132, 134, 136, and 138, a wire 168 can be disposed on at least one side of the traveling bag in the direction of the zippers 162 and 164 so as to maintain the shape of the traveling bag. It can be determined based on the purpose of the traveling bag whether the wire 168 and/or the first to fourth peripheral frames 132, 134, 136, and 138 are used.

Second Embodiment

FIG. 9 is a perspective view illustrating a traveling bag according to a second embodiment of the present invention, and FIG. 10 is a perspective view illustrating an opened state of the traveling bag according to the second embodiment of the present invention.

In FIGS. 1 through 10, like elements denoted like reference numerals. Thus, detailed descriptions thereof will be omitted. Referring to FIGS. 9 and 10, the traveling bag of the second embodiment is characterized by first to fourth connecting members 180, 182, 184, and 186 shaped like a clip and provided for detachably connecting first to fourth peripheral frames 132, 134, 136, and 138.

In detail, the first to fourth connecting members 180, 182, 184, and 186 are used to detachably connecting neighboring edges of the first to fourth peripheral frames 132, 134, 136, and 138 (for example, edges of first and second peripheral frames 132 and 134, edges of second and third peripheral frames 134 and 136, edges of third and fourth peripheral frames, and edges of first and fourth peripheral frames 132 and 138). For this, first and second holding members 142 and 144 are disposed on the neighboring edges of the first to fourth peripheral frames 132, 134, 136, and 138. That is, the first to fourth connecting members 180, 182, 184, and 186 are detachably coupled to the first and second holding members 142 and 144 disposed on the neighboring edges of the first to fourth peripheral frames 132, 134, 136, and 138. In more detail, the first connecting member 180 may connect an edge of the first peripheral frame 132 to an edge of the second peripheral frame 134. The second connecting member 182 may connect the other edge of the second peripheral frame 134 to an edge of the third peripheral frame 136. The third connecting member 184 may connect the edge of the third peripheral frame 136 to an edge of the fourth peripheral frame 138. The fourth connecting member 186 may connect the edge of the fourth peripheral frame 138 to the edge of the first peripheral frame 132.

FIG. 11 is an enlarged view of the encircled portion of FIG. 10. Although the third and fourth peripheral frame 136 and 138, and the third connecting member 184 are only shown in FIG. 11, the following description of FIG. 11 is commonly applied to the first to fourth peripheral frames 132, 134, 136, and 138 and the first to fourth connecting members 180, 182, 184, and 186.

Referring to FIG. 11, the first and second holding members 142 and 144 are hole-shaped and are disposed on two neighboring edges of the third and fourth peripheral frame 136 and 138 in the depth direction of the traveling bag. The third connecting member 184 includes first and second pin portions 184 a and 184 b, and a bridge 185 connecting the first and second pin portions 184 a and 184 b. The first and second pin portions 184 a and 184 b are configured to be inserted into the first and second holding members 142 and 144 of the third and fourth peripheral frame 136 and 138. Therefore, the third and fourth peripheral frames 136 and 138 can be connected by inserting the first and second pin portions 184 a and 184 b into the first and second holding members 142 and 144.

Alternatively, the first and second holding members 142 and 144 of the third and fourth peripheral frame 136 and 138 can be shaped into a protrusion shape (not shown) extending in the depth direction of the traveling bag, and the first and second pin portions 184 a and 184 b of the third connecting member 184 can have holes (not shown) corresponding to the first and second holding members 142 and 144. This alternative case has the same effect.

When the first to fourth connecting members 180, 182, 184, and 186 are inserted into the holding members 142 and 144 disposed on the neighboring edges of the first to fourth peripheral frames 132, 134, 136, and 138, the first to fourth peripheral frames 132, 134, 136, and 138 can be connected into a rectangular shape. Thereafter, when the first to fourth connecting members 180, 182, 184, and 186 are released from the holding members 142 and 144, the first to fourth peripheral frames 132, 134, 136, and 138 can be separated.

Like in the first embodiment, a handle 152 can be disposed on a first peripheral side 114 by fixing the handle 152 to the first peripheral frame 132 using first fixing members R1 such as rivets passing through an outer cover 102. A wheel 156 can be mounted on the third peripheral side 118 by fixing the wheel 156 to the third peripheral frame 136 using second fixing members R2 (refer to FIG. 15) such as rivets or bolts and nuts passing through the outer cover 102. In the same way, the second and fourth peripheral frames 134 and 138 can be coupled to second and fourth peripheral sides 116 and 120 using fixing members such as rivets or bolts and nuts. Therefore, the first to fourth peripheral frames 132, 134, 136, and 138 can be folded together with the first to fourth peripheral sides 114, 116, 118, and 120.

Alternatively, an additional inner cover can be used to fold the second and fourth peripheral frames 134 and 138 together with the second and fourth peripheral sides 116 and 118. This structure will be described with reference to FIG. 12. FIG. 12 is a sectional view taken along line XII-XII of FIG. 10.

Referring to FIG. 12, the traveling bag of the second embodiment may further include a second inner cover 167. The second inner cover 167 may cover the fourth peripheral frame 138. Both edges of the second inner cover 167 can be fixed between the rear side 112 and the fourth peripheral side 120 by, for example, stitching. In this way, the fourth peripheral frame 138 can be folded together with the fourth peripheral side 120. The second peripheral side 116 can be folded together with the second peripheral frame 134 in the same way. The traveling bag may further include an additional inner cover for covering inner surfaces of a rear frame 130 and the first to fourth peripheral frames 132, 134, 136, and 138. In this case, items can be easily put into the traveling bag and taken out of the traveling bag without interferences.

Therefore, when the first to fourth connecting members 180, 182, 184, and 186 are coupled to the holding members 142 and 144, the second and fourth peripheral sides 116 and 120 and the first to fourth peripheral frames 132, 134, 136, and 138 can be connected into a rectangular shape having a predetermined volume regardless of whether the traveling bag is filled with items or not. After the first to fourth connecting members 180, 182, 184, and 186 are released from the holding members 142 and 144, the second and fourth peripheral sides 116 and 120 and the first to fourth peripheral frames 132, 134, 136, and 138 can be folded on to the rear side 114. Therefore, the traveling bag can be folded into a flat shape.

FIGS. 13 through 15 are perspective views for explaining a method of folding the traveling bag according to the second embodiment of the present invention.

First, the traveling bag of the second embodiment is laid down as shown in FIG. 13 to easily fold the traveling bag. In this state, the rear side 112 of the traveling bag faces the floor, and a front side 110 of the traveling bag faces upward.

Next, as shown in FIG. 14, a door of the traveling bag is opened using a main zipper 150 to expose the first to fourth connecting members 180, 182, 184, and 186.

Next, the first to fourth connecting members 180, 182, 184, and 186 are detached. The first to fourth connecting members 180, 182, 184, and 186 can be easily detached by lifting the first to fourth connecting members 180, 182, 184, and 186 toward the front side 110. In this way, the first to fourth peripheral frames 132, 134, 136, and 138 can be separated.

Next, as shown in FIG. 15, the second and fourth peripheral sides 116 and 120 are folded inwardly against the rear side 114. In this way, the traveling bag of the second embodiment can be folded into a flat shape, and thus the volume of the traveling bag can be reduced.

The folded traveling bag can be unfolded in a reverse order. That is, after erecting the first and third peripheral sides 114 and 118 and the second and fourth peripheral sides 116 and 120 at an upright angle to the rear side 112, the first to fourth connecting members 180, 182, 184, and 186 are coupled so as to connect the first to fourth peripheral frames 132, 134, 136, and 138 into a rectangular shape (refer to FIG. 10). Therefore, according to the present invention, whether the traveling bag is filled with items or not, the traveling bag can maintain its volume. After putting items into the traveling bag, the main zipper 150 can be closed to safely keeping and carrying the items.

FIG. 16 is a perspective view illustrating a modified version of the traveling bag of the second embodiment of the present invention. Elements of the modified version having the same functions and structures as the above-described elements will be denoted and referred to in the same way, and thus detailed descriptions thereof will be omitted.

Referring to FIG. 16, in the modified version of the second embodiment, first to fourth subsidiary zippers 192, 194, 196, and 198 are disposed between the first to fourth peripheral sides 114, 116, 118, and 120.

In detail, the first subsidiary zipper 192 is disposed between the first and second peripheral sides 114 and 116 to connect neighboring edges of the first and second peripheral sides 114 and 116. The second subsidiary zipper 194 is disposed between the second and third peripheral sides 116 and 118 to connect neighboring edges of the second and third peripheral sides 116 and 118. The third subsidiary zipper 196 is disposed between the third and fourth peripheral sides 118 and 120 to connect neighboring edges of the third and fourth peripheral sides 118 and 120. The fourth subsidiary zipper 198 is disposed between the first and fourth peripheral sides 114 and 120 to connect neighboring edges of the first and fourth peripheral sides 114 and 120.

Therefore, the first to fourth peripheral sides 114, 116, 118, and 120 can be folded more easily after detaching the first to fourth connecting members 180, 182, 184, and 186, and opening the first to fourth subsidiary zippers 192, 194, 196, and 198. When unfolding the traveling bag, the first to fourth connecting members 180, 182, 184, and 186 can be easily coupled to the first to fourth peripheral frames 132, 134, 136, and 138 after closing the first to fourth subsidiary zippers 192, 194, 196, and 198 to temporarily connect the first to fourth peripheral sides 114, 116, 118, and 120.

The present invention is not limited to a traveling bas called a cart type bag. The present invention can be applied to various bags, which will be apparent to those of ordinary skill in the art. Therefore, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. 

1. A traveling bag having front and rear sides, and four peripheral sides connecting the front and rear sides, the traveling bag comprising: first and second zippers each configured to connect three edges of each of two mutually facing peripheral sides of the four peripheral sides to one of the front and rear sides and edges of the other two peripheral sides, wherein when the first and second zippers are opened, the two mutually facing peripheral sides are foldable along the other edge thereof.
 2. The traveling bag of claim 1, further comprising peripheral frames disposed at at least the two mutually facing peripheral sides of the four peripheral sides so as to maintain a shape of the traveling bag.
 3. The traveling bag of claim 1, further comprising a wire disposed along at least a side of the first and second zippers so as to maintain a shape of the traveling bag.
 4. The traveling bag of claim 1, further comprising: a main zipper disposed at the front side to form a door; and a handle disposed on an outer surface of at least one of the four peripheral sides.
 5. The traveling bag of claim 1, further comprising: a cart handle extendable from at least one of the four peripheral sides; and a wheel disposed at at least one of the four peripheral sides.
 6. A traveling bag having front and rear sides, and four peripheral sides connecting the front and rear sides, the traveling bag comprising: four peripheral frames disposed at inner surfaces of the four peripheral sides, respectively, so that both edges of the peripheral frame is close to edges of two neighboring peripheral frames; and four connecting members each configured to connect closely disposed edges of two neighboring peripheral frames of the four peripheral frames.
 7. The traveling bag of claim 6, further comprising first and second holding members disposed at both edges of the four peripheral frames in a direction from the front side to the rear side, wherein each of the four the connecting members detachably connects the first and second holding members disposed at the closed disposed edges of the two neighboring peripheral frames.
 8. The traveling bag of claim 7, wherein each of the four connecting members comprises: first and second pin portions configured to be coupled to the first and second holding members disposed at the closed disposed edges of the two neighboring peripheral frames; and a bridge connecting the first and second pin portions.
 9. The traveling bag of claim 7, wherein one of the pin portion and the holding member comprises a hole formed in the direction from the front side to the rear side, and the other of the pin portion and the holding member comprises a protrusion formed in the same direction as the hole.
 10. The traveling bag of claim 6, further comprising first to fourth subsidiary zippers disposed between the four peripheral sides.
 11. The traveling bag of claim 6, further comprising: a main zipper disposed at the front side to form a door; and a handle disposed on an outer surface of at least one of the four peripheral sides.
 12. The traveling bag of claim 6, further comprising: a cart handle extendable from at least one of the four peripheral sides; and a wheel disposed at at least one of the four peripheral sides. 